1. It is unfavorable to have small requirements when using electrodes.

2. In terms of operability and weld formation, if the tension is to be dried, it is beneficial to dry the electrode. When the oxygen content in the arc atmosphere and the molten pool is high, the surface tension of the molten pool (oxygen) will be changed. Is the best activator), which makes the control of the molten pool and the post-weld formation disadvantageous. Especially for welding in space (such as overhead welding), the tension on the surface of the molten pool is helpful for structural welding, which is a process requirement.